699556401 has 12 divisors (see below), whose sum is σ = 1020476340. Its totient is φ = 461752800.

The previous prime is 699556393. The next prime is 699556411. The reversal of 699556401 is 104655996.

It is a happy number.

699556401 is a `hidden beast` number, since 6 + 99 + 556 + 4 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 617472801 + 82083600 = 24849^2 + 9060^2 .

It is not a de Polignac number, because 699556401 - 2³ = 699556393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (699556411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 383886 + ... + 385703.

It is an arithmetic number, because the mean of its divisors is an integer number (85039695).

Almost surely, 2^699556401 is an apocalyptic number.

It is an amenable number.

699556401 is a deficient number, since it is larger than the sum of its proper divisors (320919939).

699556401 is a wasteful number, since it uses less digits than its factorization.

699556401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769696 (or 769693 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 699556401 is about 26449.1285489711. The cubic root of 699556401 is about 887.7164033819.

The spelling of 699556401 in words is "six hundred ninety-nine million, five hundred fifty-six thousand, four hundred one".